Test board for telephone systems



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Nov. 11, 1952 F. KESSLER 27,517,897

TEST BOARD FOR TELEPHONE SYSTEMS Original Filed Sept. 17, 1947 21 Sheets-Sheet 2 FIRST TEST K23IR TEST BOARD cu c2|3 22| INVENTOR. FRANK KESSLER An s.

F. KESSLER TEST BOARD FOR TELEPHONE SY STEMS Nov. 11, 1952 21 Sheets-Sheet 5 Original Filed Sept. 17, 1947 \NRQI 83 32 t Mimi [i 00m 50 Emmi. m2]

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1952 F. KESSLER TEST BOARD FOR TELEPHONE SYSTEMS 21 Sheets-Sheet 7 Original FiledSept. 17, 1947 N wE ATTYS:

Nov. 11, 1952 F. KESSLER TEST BOARD FOR TELEPHONE SYSTEMS 21 Sheets-Sheet 8 Original Filed Sept. 17, 1947 N20 em 104 O N mmmx mmmwz 304 1004 mmmmx HP m ozE wmwx LO N mm lu l i I INVENTOR.

' FRANK KESSLER Ema F. KESSLER TEST BOARD FOR TELEPHONE SYSTEMS 21 Sheets-Sheet 9 mm m mo: Qmx .FmwP mimx 1 5x P30 55 omz @004 INVENTOR. FRANK KESSLER ATTY.

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Nov. 11, 1952 Original Filed Sept. 17, 1947 Nov. 11, 1952 F. KESSLER TEST BOARD FOR TELEPHONE SYSTEMS 21 Sheets-Sheet l2 Original Filed Sept. 1'7, 1947 mam-+ INVENTOR FRAN K KESSLER ATTYS F. KESSLER TEST BOARD FOR TELEPHONE SYSTEMS Nov. 11, 1952 21 Sheets-Sheet 15 Original Filed Sept; 17, 1947 wmQ OwmE on m INVENTOR.

FRANK KESSLER M ATTYS.

1952 F. KESSLER TEST BOARD FOR TELEPHONE SYSTEMS 21 Sheets-Sheet 16 Original Filed Sept. 1'7, 1947 INVENTOR. FRANK KESSLER ATTYS.

Nov. 11, 1952 F. KESSLER TEST BOARD FOR TELEPHONE SYSTEMS 21 Sheets-Sheet 1'7 ,ZQNG

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Nov. 11, 1952 F. KESSLER TEST BOARD FOR TELEPHONE SYSTEMS Original Filed Sept. 17, 1947 21 Sheets-Sheet 2O S-FQ INVEN TOR FRANK KESSLER Om QE ATTYS. 

